the.com/sudoku
A 9x9 grid where the only rule is that nothing repeats, and humans repeat themselves anyway.
Not JapaneseInvented by an American architect, popularized in Japan
No mathNumbers are just symbols; logic does all the work
Possible grids6.67 sextillion valid solutions exist
Minimum cluesNeeds at least 17 givens for unique solution
Original nameCalled Number Place in 1979 America